what is undue influence ?

how many classes are there of UI?

what are they?

where was Class 1 set out?

what does class 1 require ?

Lord Nicholls described 'unacceptable conduct' as what ???

what is the difference between class 2a and class 2b presumed undue influence ?

for class 2a, there is no requirement to prove a ui was performed.. however what does need to be established ?

there is no .. what for class 2b

cases?